Vauxhall Cross

Vauxhall Cross is the illustriousLondon headquarters of Britain's external security service MI6. Built in 1993, and occupied by MI6 in 1995, it is located on the south bank of the river Thames, close to Vauxhall Bridge.
The building itself is ironically one of the most striking and well-known shapes on the London skyline. The initial impression is that of a fortress with green glass windows.
Inside, Vauxhall Cross is apparently comparable with some of the best offices. Entrance is by staff number and passcode, and inside staff have access to, among other things, a squash court.